Feed-water heater and circulating system



(No Model.)

S. G. DBSPRES. FEED WATER HEATER AND` GIRGULATING SYSTEM.

No. 483,905. Patented 001;. 4, '1892.

Tv Pur-1P ma cams ravens col, moro-mno., msmnqcm. n. c.

UNITED STATE-sf STANISLAUS CHARLES DESPRES,

PATENT OFFICE.

CF TRAVERSE CITY, MICHIGAN.

FEED-WATER HEATER AND CIRCULATING SYSTEM.

SPECIFICATION forming part of Letters Patent No. 483,905, datedgOctober4, 189,2. Application filed May 9. 1892. Serial No. 432.300. (No model.)

To all whom it may concern,.-

Be it known that I, STANISLAUs CHARLES Y DESPRES, a citizen of theUnited States, re-

. I do hereby declare the following to be a full,

clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

Myinvention is an improvement in that class of attachments tosteam-boilers in which a series of water-conducting tubes or pipes arearranged within or about the tire-box for the purpose of heating thefeed-water on its passage to the boiler and increasing thesteamgenerating capacity of the device. -f

The primary object of my invention is t provide a combined Waterfeeding, heating, and circulating system which will in crease thecapacity of the boiler, secure a greater heating-surface for a givenamount of space, reduce the quantity of fuel required for heatingpurposes, and increase the steam-generating capacity of the apparatus.

A further object is to provide improved means for heating Water insideof a boiler not i in use or which may be held in reserve by causing acirculation of the wat-er in said boiler through coils placed in anadjoining boiler which is in use, so that water in an unused boiler orboilers may be kept constantly heated without rendering it necessary tokeep a fire continuously burning for the purpose of heating the reserveboiler or boilers.

The several objects are accomplished by a simple and inexpensive systemof valved circulating pipes or tubes, which arearranged so that theinfed water is delivered at the highest boiling-point in a boilingcondition, while the circulation is from the boiler through a pipe orpipes connected therewith at its lowest point and thence to the boilerbelow the lowest safety water-line thereof, so as to insure a perfectlcirculation and at the same time prevent burning out thecirculatingpipes,thelatter being also adapted to prevent theformation-of air-traps therein.

The invention will first be described in connection with theaccompanying drawings, and

then particularly pointed out in theclaims at the end ot thisspecification.

In the drawings which form a part of this specication, Figure l4represents a sectional side elevation ofV a steam-boiler andattachments embodying my invention. Fig. is a rear view showing twoboilers with connected circulating systems, and Fig. 3 is ahorizontalsection taken on line III III of Fig. 2.

Similar letters of reference are used to denote similar parts in each ofthe several views.

A denotes a boiler for steam-generating purposes, which may have thereinan ordinary water and steam chamber and a series or collection oflongitudinally-disposed pipes eX- tending from the front to the rear ofthe boiler in the usual manner, so that the heat from the tire-chambermay pass through said pipes for the purpose of heating the water -incontact therewith.

B denotes the furnace-walls, of brick or other suitable material, whichmay be arched or otherwise formed to suit the requirements of the boilerwhich is fitted therein.v

C denotes the stack or chimney, and D the lire-box, these parts beingconstructed in any suitable manner.

E E denote suitable pipes or tubes, which may connect with an opening inthe lowest point ofthe boiler by means of la pipe or tube E of such sizeas is best adapted to the size of the boiler, so as to insure sufficientow of water through said opening and pipe to supply a pipe'or pipeslilwhich` latter are placed inside ofl the lire-archer fire-box orthereabout in such position that the tire orA heat used in heating theboilermay come in contact with said pipes or tubes. The pipe or 'pipes Ein any desired number may extend back and lforth parallel with theboiler at either or both sides thereof and are secured in properposition to the walls of furnace or fire box in such manner as to insureroom for expansion and contraction, the several pipes when constructedin sections being connected by unionjoints or couplings which willpermit easy connection or disconnection between the circulating systemand boiler. The free upper end or ends of the pipe or pipes E mayconnect with the boiler by means of a pipe or IOO pipes E2, arranged toenter a suitable opening or openings in the end orsides of-the boiler ofa size equal to the capacity of` the pipe, such opening being placedbelow the lowest safety water-line of the boiler. The pipes E E2 areprovided with straight-way or other suitablevalves e e2 for controllingthe iiow of water therein, these valves being located between theopening in the boiler and the pipe ends or T-coupling section E3connecting the terminals of pipes E E at either side of the boiler withthe pipes E E2, so that a single valve will suflice to control the flowof water to both sets or series of pipes. The

lowermost pipe or portion of one of the circulating-coils E at one sideof the boiler may communicate with a pump, inspirator, or other suitabledevice for supplying water to the boiler by means of a suitable pipe ortube F, which isprovided with a check-valve fand with a stop valve orcock f the stop-valve being designed to close the passage through pipe Fwhen it is necessary to repair or replace the check-valve.

With the described construction, the boiler having been supplied withthe necessary quantity of water through valves f e2, valve e is opened,and thereupon the water will circulate freely, passing directly from thebottom of the boiler through pipe E and into the circulating-pipe E orlowermost section of the series of pipes, and thence gradually rising ina serpentine course through said pipes E will return to the boilerthrough the pipe-section E2 near the top of the boiler at the highestboiling-point, thereby producing a perfect circulation by gravitationand ebullition, which is accomplished by causing the cold water to enterthe lowest-pipe or point of the coil and allowing it to rise of itself,as it must when it becomesheated and enter the highest boilingpoint ofthe boiler in a boiling condition, thereby affording a circulation onthe boiler, which is increased in accordance with the heat applied,regardless of the pressure on the boiler as the pressure is equal on allsides, and the circulation must take place by gravitation andebullition. Valve e2 is open at all times, except when necessary to cutoff the circulating system from the boiler, either for repairs or forthe purpose of connecting the system with another or reserve boiler.Valve f is closed and valve e open, except when feeding. In feedingvalve e should be closed and valve f opened, so that the feed-water maypass into the lower pipe or lowest point of the coil and rise therein asit becomes heated, as already explained.

In cases where it is desirable to have a boiler or boilers in reserveready for use on short notice, as is the case with water-works, electricplants,large hotels, dac, it is necessary to keep a fire constantlyburning under the reserve boiler or be subjected to the annoyance ofwaiting to get steam, which is very essential in some of the cases abovereferred to. I therefore propose to provide means for heating waterinside of a boiler or boilers not in use by the circulation Aof thewater in'such` boiler through coils placed in proximity to an adjoiningboiler which is in use, so that the water in the reserve boiler orboilers may be kept at a boiling-point without necessitating the extraexpense due to the consumption of fuel in such cases. To thisendl-provide detachable pipe sections'or couplings G G,which the boilerA, except thatthe inletis from theA circulating-coil in the fire-box ofthe main boiler through the straight-way valves interposed in thedetachable coupling-sectlons, which valves may be opened or closed atwill for the purpose of opening or closing communication between the twoboilers. f

The two boilers may be separated by a division-wall and provided with acommon stack- C and {ire-box in each for separate irespif necessary, orthe reserve boiler may be disconnected entirely from the fire-box andstack of the main boiler. i

When it is desired to use boiler A alone, valves g g are closed. Ifboiler A is to .be used alone, valves e e2 should be closed and valves gg opened. If boiler A is tovbe used and at the same time the water inthe circulating-pipes thereof utilized for heating the water in thereserve boiler A', valves e e2 are closed and valves g g and h h opened,and thereupon the circulation will take place from IDO the heated coilsthrough the reserve boiler and may be cut off and turned on at will bymanipulating the valves e e g g for the purpose of keeping the Water inthe reserve boiler at any desired temperature and causing a circulationthrough either boiler independently of the other. When the system isused on two or more boilers not having an equalizing-pipe,it will benecessary to connect the feed-pipe to each boiler, as indicated by thedotted linesI in Fig. 3.

The several valves and union joints connecting the valved portions ofthe circulating system with the circulating-pipes inclosed within thefire-box or furnace-walls are all placed outside of the brickwork orwall, so as to protect the same from the heat.

It is well known that Water will not circu-l late through a horizontalpipe, and that to obtain a perfect circulation the ends of the pipestaking the water and passing it back to the boiler must be under thewater-line, otherwise you will only get steam back to the top of theboiler as fast as it forms in the coils. It is also well known that afree circulation of water is prevented by the formation of air-traps ina spiral or abruptly-bent pipe or way along which the water must beconducted. .In View of these difficulties the disposition of the pipesand the inclination thereof in my system are such as to conduce to thefree circulation of the water and entirely avoid the formation ofair-traps in the coils orbends of the pipes. Furthermore, thecirculating-coils are placed inside of the brick arch out of the wayland in position to receive heat, which would otherwise be absorbed bythe bricks, and the pipes are practically a protection to the walls ofthe fireplace or furnace.

Having thus fully described my invention, what I claim, and desire tosecure by Letters Patent of the United States, is-

l. A combined water heater, feeder, and circulating system forsteam-boilers, comprising a series of pipes or tubes arranged onopposite sides of the boiler, a pipe-section connecting the lowerterminals of the series of pipes with the bottom of the boiler through asingle controlling-valve, a similar pipe-section connecting the upperterminals of said series of pipes with the upper part of the boilerbelow the water-line therein, a single valve for controlling the iow ofwater through the lastmentioned pipe-section, and avalVe-controlledfeed-pipe communicating with both series of circulating-pipes,substantially as described.

2. In a water heater, feeder, and circulating system for steam-boilers,the combination of the series of pipes extending back and forth ateither side on a gentle incline from the receiving to the delivery endsthereof, couplings connecting the two series of pipes at their receivingand delivery ends, an intermediate pipe-section connecting the lowercoupling with the bottom of the boiler, a similar pipesection connectingthe upper coupling with the upper part of the boiler below the waterlinetherein, a single valve controlling the iiow through each of saidpipe-sections, and a valved feed-pipe communicating with both series 'ofcirculating-pipes, substantially as described.

3. In combination with the main boiler and water-circulating pipes orcoils and the valves for controlling such pipes, a reserve boller andwater-circulating pipes connected therewith, and interposed valvemechanism, substantially as described, wherebythe water 1n the reserveboiler may be heated by the circulation of the water from the coils ofthe main boiler through the reserve boiler, and vice versa,substantially as set forth.

4. In combination with the main boiler and its valved circulating-pipes,the reserve boiler provided with a similar system of valvedclrculating-pipes, and the coupling connecting the pipes of the twoboilers and provided with a Valve for controlling the circulation"between the same, substantially as described.

5. In combination with the boiler and furnace, the series ofvertically-disposed circulating-pipes secured to the furnace-walls ateither side thereof and connecting at one end with the boiler at orabout at the highest boiling point and at the other end with the lowestpoint of the boiler, the feed-pipe with stopvalve therein, and thestraight-way valves -interposed in said circulating-pipes betweensaidstop-valve and the pipesections leading to the boiler, together with thereserve boiler,

provided with a similar double series-,of cir-l culating-pipes andstraight-Way valves ycontrolling the same, and the intermediate cutoffvalves for opening and closing communication between the reserve boilerand adjacent circulating-coils, substantially as (le--8 scribed.` I

In testimony whereof I afx my signature 1n presence of two witnesses.

Witnesses:

' CHARLES J. KNULAND,

JAS. G. JOHNSON.

S. CHARLES DESPRES'.`

